Saw filing machine



Dec. 9, 1947. H. A. HENDRlc'KsoN, JR 2,432,420

-' sAw FILING MACHINE Inventor Dec. 9, 1947. H. A, HENDRICKSON, JR

SAW FILING MACHINE Filed Aug. 1, 1945 3 Sheets-sheet 2 :uli

Inventar Dec. 9, 1947. H. A. HENDRICKSON, JR v 2,432,420

' SAW FILING MACHINE Filed Aug. l,V 1945 3 Sheets-Sheet I5 V- L lPatented Dec. 9, 1947 UNITED STATES PATENT OFFICE SAW FILING MACHINEHarold A. Hendrickson, Jr., Red Bank, N. J. Application August 1, 1945,Serial No. 608,225

(Cl. 'i6-78) 6 Claims.

This invention relates to saw ling machines of the type wherein the sawbeing led is supported for traversing movement with respect to the file,movement being imparted to the saw by a pawl mechanism which isperiodically moved during operation oi the machine.

The present invention is particularly directed to improvements in thesaw supporting means, and an important object of the invention is toprovide an efcient guide device for the lower ends of the dependingclamp-carrying arms of the saw carrier, so that the latter may have freeend-wise movement but is most securely held against forward or rearwardmovement cr vibration.

Another important object of the invention is to yprovide a novel form ofclamp device for one of the depending arms of the saw carrier, whichclamp device will securely hold the smaller end of the saw blade againstvibration and will effectively engage such end of the blade even thoughthe latter is relatively narrow or tapered substantially to a point.

A further object of the invention is to provide a clamp device of theabove kind which is so constructed that it may be readily adapted or.conditioned for use in connection with the carrier for a crowned saw orthe carrier for a straight saw.

The exact nature o f the present invention, as well as other objects andfeatures thereoi, will become apparent from the following descriptionwhen considered in connection with the accompanying drawings, in which:

Figure 1 is a fragmentary front elevational View of a saw ling machineequipped with saw supporting means constructed in accordance with thepresent invention.

Figure 2 is a View principally in side elevation, of the constructionshown in Figure 1.

Figure 3 is an enlarged fragmentary horizontal section takensubstantially on line 3-3 of Figure 1.

Figure 4 is a fragmentary vertical section taken on line 4-4 of Figure1.

Figure 5 is an enlarged section taken on line 5--5 of Figure 3. v

Figure A6 is an enlarged fragmentary section taken on the line B- ofFigure 7 and showing details ofthe im-proved clamp device -forming partof the present invention.

Figure 7 1s a horizontal section taken on line of Figure 6.

Figure 8 is a fragmentary vertical section showing the clamp device inuse with a saw carrier.

Figure 9 is a perspective view of the construction shown in Figure 8with the saw omitted.

The present invention is illustrated in connection with a saw filingmachine having a carlength of angle iron rier 5 for a le F and mechanismincluding levers B for automatically imparting a step by step feedingmovement to a saw S mounted on a saw carrier 1, the le carrier 5 andlevers 6 being actuated through suitable mechanism by means of a drivingmotor 8. The machine is mounted on a bench 9 and further includes a faceplate I0 having a vise member II hinged thereto at I2, the plate i0 andmember having cooperating saw blade steadying jaws I3 and I4,respectively. The vice member |I is drawn toward the face plate I0 bymeans of a screw I5 having a hand wheel I 6 and a lock wheel I1. Duringthe filing of a circular saw, the center of the saw is positioned at thecone surface I8 which may be vertically adjusted by means of anadjusting screw I9. The saw carrier comprises the usual horizontal bar20 having a plurality of depending spaced arms 2| provided with verticalslots 22 which receive nutted bolts 23 that ordinarily pass throughsmall clamping plates 24 for engagement with the saw blade along theback edge of the latter. The clamping plates 24 are thus adjustablevertically in accordance with the width of the saw blade. The arms 2!have rearwardly directed angular upper end portions 25 which are rivetedor otherwise rigidly secured to the bar 20, and the bar 29 may besuitably guided for endwise movement as at 26, the guiding means for bar20 being of the kind disclosed in the'U. S. patent to F. E. Collier, No.1,728,393, September 17, 1929, or 2,343,171, February 29, 1944. The sawcarrier may embody arms 2| whose slotted portions are perfectly flatfrom end to end as shown in Figures 1 to '7 inclusive. Some carriers,however, have arms 2| whose slotted end portions are forwardly oiset attheir upper ends as `indicated at 21 in Figures 8 and 9. Thus fardescribed, the construction is old and well 1snown in the art.

In actual practice, it has been found that the saw carrier is subject toobjectionable lateral vibration, the guiding means for the bar 20 beinginsufficient to wholly prevent `forward and rearward swaying of thedepending arms 2|. In order to effectively and positively prevent thisobjectionable vibration of the saw carrier and saw, I provide a guidedevice for the lower ends of Vthe depending arms 2|, which guide devicepermits free endwise movement of the saw carrier and provides suicientclearance to permit slight vertical movement Vof thearms 2| as requiredwhen ling crowned saws, As shown, this guidev device preferably consistsof a suitable 28 having transverse elon gated slots 29 in one flangethereof, and a guide bar 30 of suitable length and of rectangular crosssection disposed on the slotted flange of the angle iron 28 and inspaced parallel relation `to the other flange of the latter. Bolts 3|are extended .as shown in VFigures l, 6 and through the slots 29 andthrough openings of the bar 30, and nuts 32 are threaded on the ends ofthe bolts 3| so as to secure the bar 30 in adjusted position so that theSpace between seid ber .3.0 and the unslotted flange of angle iron 2,8Ais just sufficient to accommodate the lower ends ofthe arms 2| with asnug sliding t. The guide device is secured to the face plate I so as toextend across the latter in front of the same, with the slotted flangeof angle iron 28 disposed horizontally and projecting rearwardly andwith the unslotted flange vertically disposed. This positions the guidedevice parallel with the bar 20 in spaced relation to and below thelatter, and the guide device is secured in this position by means of abolt 33 passing through the guide bar 30 and the face plate I0 andhaving a nut 34 threaded thereon behind the plate I0. The horizontalflange of channel iron 28 is cut away intermediate its ends as at 35 soas to snugly receive the plate I9. In this way, the guide device iseiectively braced against lateral movement about a vertical axiscoincident with the bolt 33, and only the single bolt 33 is required toeffectively rigidly fasten the guide device in place. It will thus beseen that the guide device effectively prevents forward or rearward`movement of the lower ends of arm 2| while permitting endwise movementof the saw carrier. In this way, the saw carrier and the saw iseffectively restrained against lateral vibration except for the extremepointed end of the saw blade which projects beyond an end one of thearms 2|. In order to facilitate passage of the arms 2| into the spacebetween the vertical flange of angle iron 28 and the guide bar 30, theends of said guide bar 3|) are directed rearwardly as indicated at 36.When using the guide device in connection with a carrier for straightsaws which has no limited Vertical movement, said guide device may beadjusted vertically so that only slight clearance is provided betweenthe lower end edges of arms 2| and the upper surface of the horizontalslotted ange of angle iron 28. YIn the case of a carrier for crownedsaws which has slight vertical movement, the guide device will belowered to provide suflicient clearance between the lower ends of arms2| and the hori.- zontal flange of angle iron 2B to permit this verticalmovementv of the saw carrier.

It has been found that the ordinary clamping plates 24 do not restrainthe projecting small end portion of the saw blade against vibration. Ithas also been found that such ordinary clamping plates 24 may not beadjusted sulciently high to properly engage and clamp the smaller end ofa saw blade when such smaller end is n arrow or tapered substantially toa point. I accordingly Lprovide a special clamp device for use inconnection with the end arm 2| adjacent the narrow end of the saw blade,whereby the projecting portion of the small o r narrow end of the sawblade will be effectively braced against lateral vibration and may beeiectively clamped even though this end of the saw blade is relativelynarrow or tapered substantially to a point. As will be presentlyexplained, this clamping device is so constructed that it may be`readily adapted for use either with a carrier having flat arms s, s, 7,or for use in connection with Va carrier having offset arms as shown inFigures 8 and 9. vThe clamping device in question comprises apair ofsubstantially similar relatively large main clamping plates 3l and 3 8having openings in the lower portions of cor- `@1f-es rendite, ends ingbolt 23. Detachably secured to the inner or forward face of the plate 38are spacer plates 39 and 40 which are spaced apart to snugly reeeve .theadjacent erre 2| therebetween The spacer plates 39 and 4 0 may besecured in place by means of stud screws 4|' passed therethrough andthreaded into the main clamping plate 38, the heads of the screws 4|being countersunk in the spacer plates. Spacer plates 39 and 40 are of aforni and size corresponding to the portions of plates 37 and 38 atopposite sides of the arm 2|, AlsoI the portions of plates 3`| and 38which project beyond the outer side of the associated arm 2| arerelatively long so as to grip the projecting smaller end of the sawblade for substantially its full length. In addition the plates 31 and38 project a considerable distance above the clamping bolt 23 so thatthey will .effectively en,- gage and clamp the smaller `end of the sawblade when adjusted to the upper limit of movement allowed by the slot22 and even though the smaller end of the saw blade is relatively narrowor tapered substantially to a point. This has not kbeen possible inconnection with the use of the ordinary clamping plates 24 because thelatter could not be adjusted sufliciently high to properly engage thesmaller end of a saw blade when said end is extremely narrow or taperedsubstantially to a point. When using the clamp device in connection withthe carrier having flat arms, the spacer plates 39 and 40 are attachedto the plate 38 as described and the plate 38 is positioned behind theassociated arm 2| so that the latter is received between the spacerplates 39 and 40 aS ShOWn in Figures 6 and 7. The clamping plate 3'! isthen disposed in front of the arm 2|, bolt 23 is passed through theplates 31 and 38, and a nut is threaded on the bolt 2,3 so as to drawthe plates 31 and 38 toward each other with the small or narrow end ofthe saw blade eieetively clamped between the plate 31 and the spacerplates 39 and l0 and arm 2 I. When the clamp device is properlypositioned, the upper edges of the plates 37 and 38 will be in closeproximity to the teeth of the saw as shown in Figure 1.

In order to adapt the clamp device for use in connectionr with thecarrier having offset arms, the spacer plates 39 and i9 are detached byremoving the screws 4|. 'In this connection, it is noted that'the rea-rmain clamping plate V3-3 is provided in its upper edge with a relativelydeep rectangular cutout or notch las at d2. After removal of the spacerYplates as) and as, gne plate 323 is positioned in front of the arm `21|and the eine et is resigned @sans ne ,f1-.ont .of the plate 38; theforward Qsei 27 .Q f meer@ 2." being received in the cutout or notch 42.saw blade is thus `,received between the plates 31 and 38, flatlycontacting plate 33 and the offset 2 at one side and the plate v3i Iatthe `opposite side as shown in Figure 8. The nut on bolt 23 is thentightened@ @het the .Sew blade is. .Securely clamped in place. The`cutout or `slotliZ permits the plates 3'! and 38 to be adjustedsuili'oiently high to effectively engage and clamp the small end of thesaw bladeeven though the latter is narrow and tapered substantially to apoint. It will thus be seen that the special clamp device eliminatesvibration of the projecting Agia-,rrpw end of the saw blade while theguide device for the arms 2|' eliminates all other 4,objectionablevibration .of the saw and saw carrier. This nalgas it possible te moetreedilfv expeditie-miv rre- .eeed with it- 1e elias epeletiee .that

form satisfactory work may be accomplished Without the exercise ofspecial skill or care.

From the foregoing description, it is believed that the construction,operation and advantages of the present invention will be readilyundersto-od and appreciated by those skilled in the art. Minor changesmay be made in details of construction illustrated and described, suchas fall within the scope of the invention as claimed.

What I claim is:

1. In a saw filing machine having a face plate, the combination with asaw carrier embodying a horizontal bar provided with a plurality ofdepending arms carrying saw blade clamping plates, and means on the faceplate cooperating Vwith said horizontal bar for supporting the sawcarrier for endwise movement, of a guide device mounted on the faceplate and slidably receiving the lower ends of said depending arms so asto prevent lateral vibration of the saw carrier while permitting theendwise movement thereof, said guide device comprising a, horizontalangle iron having a vertical flange and a horizontal ilange projectingrearwardly from the lower edge of said vertical ilange, a guide barsecured on the horizontal flange behind and in spaced parallel relationto the vertical ange so that the lower ends of the depending arms arereceived between the vertical flange and said guide bar, and means torigidly secure the guide bar to the face plate.

2. The construction dened in claim 1, wherein the horizontal flange ofsaid angle iron has a notch in its rear edge for snug reception of theface plate so as to restrain the guide device against lateral strains.

3. The construction defined in claim 1, wherein said horizontal flangeof the angle bar has transverse elongated slots therein, and boltspassing through said slots and through the guide bar for adjustablysecuring the guide bar in the desired spaced relation to the verticalflange of the angle iron.

4. In a saw filing machine having a face plate, a saw carrier embodyinga horizontal bar provided with a plurality of depending arms, saw bladeclamping plates carried by all but one of said arms, means on the faceplate cooperating ,with said horizontal bar for supporting the sawcarrier for endwise movement, and a clamp device carried by said one armfor clamping the narrow end of the saw blade and restraining said endagainst lateral vibration, said clamp device comprising twosubstantially similar relatively large main clamping plates apertured inthe lower portion of corresponding ends for reception of a clamping boltpassing through the arm, said plates being of a size to project beyondopposite sides of the depending arm and to extend into proximity of theteeth of a saw blade having a narrow end tapering substantially to apoint, the other end portions of said plates projecting a materialdistance beyond the outer side of the depending arm for clampingengagement with the narrow end of the saw blade substantially throughoutthe length of said end.

5. In a saw filing machine having a face plate, a saw carrier embodyinga horizontal bar provided with a plurality of depending arms, saw bladeclamping plates carried by all but one of said arms, means on the faceplate cooperating with said horizontal bar for supporting the sawcarrier for endwise movement, and a clamp device carried by said one armfor clamping the narrow end of the saw blade and restraining said endagainst lateral vibration, said clamp device comprising twosubstantially similar relatively large main clamping plates apertured inthe lower portion of corresponding ends for reception of a clamping boltpassing through the arm, said plates being of a size to project beyondopposite sides of the depending arm and to extend into proximity of theteeth of a saw blade having a narrow end tapering substantially to apoint, the other end portions of said plates projecting a materialdistance beyond the outer side of the depending arm for clampingengagement with the narrow end of the saw blade substantially throughoutthe length of said end, one of said main clamping plates having arelatively deep notch in its upper edge portion of a width correspondingto the Width of the depending arm.

6. In a saw filing machine having a face plate, a saw carrier embodyinga horizontal bar provided with a plurality of depending arms, saw bladeclamping plates carried by all but one of said arms, means on the faceplate cooperating with said horizontal bar for supporting the sawcarrier for endwise movement, and a clamp device carried by said one armfor clamping the narrow end of the saw blade and restraining said endagainst lateral vibration, said clamp device comprising twosubstantially similar relatively large main clamping plates apertured inthe lower portion of corresponding ends for reception of a clamping boltpassing through the arm, said plates being of a size to project beyondopposite sides of the depending arm and to extend into proximity of theteeth of a saw blade having a narrow end tapering substantially to apoint, the other end portions of said plates projecting a materialdistance beyond the outer side of the depending arm for clampingengagement with the narrow end of the saw blade substantiallythroughoutthe length of said end, one of said main clamping plates having arelatively deep notch in its upper edge portion of a width correspondingto the width of the depending arm, and spacer plates detachably securedon the inner face of one of said main clamping plates at opposite sidesof the depending arm.

HAROLD A. I-IENDRICKSON, JR.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 1,422,486 Sherwood July 11, 19221,491,706 Klln Apr. 22, 1924 1,610,392 Stacy et al. Dec. 14, y19261,994,332 Baze Mar. 12, 1935 2,287,265 Oltmanns June 23, 1942 2,333,298Daggett Nov. 2, 1943

